Eccentric strange dance (7)
I believe the answer is:
oddball
'eccentric' is the definition.
(an oddball is an eccentric person)
'strange dance' is the wordplay.
'strange' becomes 'odd' (I've seen this in another clue).
'dance' becomes 'ball' (ball is a kind of dance).
'odd'+'ball'='ODDBALL'
(Other definitions for oddball that I've seen before include "Crackpot" , "Weirdo" , "Crank" , "Bold lad may be eccentric" , "Eccentric 32" .)